OBD2 Sensors >> Honda K20A3 Engine Sensor Locations

View with cosmetic engine covers removed.  2004 Honda Civic Si 2.0L
  1. Knock sensor (KS) (under intake manifold)
  2. Camshaft position sensor (CMP) and top dead center sensor
  3. Ignition coil
  4. Fuel injector
  5. Throttle position sensor (TP)
  6. Evaporative emissions (EVAP) purge valve
  7. Manifold absolute pressure (MAP) sensor
  8. Idle air control valve (IAC) (mounted on throttle body, under air intake tube)
  9. Intake air temperature sensor
  10. Valve timing electronic control (VTEC) oil pressure switch
  11. Valve timing electronic control (VTEC) solenoid
  12. Valve timing control (VTC) oil control solenoid
  13. Crankshaft position sensor (CKP) (underside of engine near crankshaft pulley)
  14. Oil pressure switch (backside of engine, near oil filter)

Models Found On

  • 2002–2006 Acura RSX
  • 2002–2005 Honda Civic Si
  • 2002–2005 Honda Civic SiR
  • 2002–2005 Honda Civic Type S
  • 2003–2006 Honda Civic 2.0 i-VTEC (SEA)

One Reply to “Honda K20A3 Engine Sensor Locations”

  1. I have an 03 si hatch back, it has a rough idle most of the time after I started her more so when cold. Po302 code and po300 po304,also. The vtec isn’t kicking in although I can feel that she’s trying. Oil change 0 w 20 synthetic new vvt valve and oil pressure switch. Plugs are new, switch coil packs around. The only time she runs better is after I clean iac map and throttle body. 211k any ideals?

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